Composition for and process of delustering artificial silk



Patented July 8, 1930 GIOVANNI TAGLIANI, OF BASEL, SWITZERLAND, ASSIGNOR TO MUNITEX COBPOBA- 'lION, OF PATERSON, NEW JERSEY,

A CORPORATION OF NEW JERSEY COMPOSITION FOR AND PROCESS OF DELUSTERING ARTIFICIAL S ILK No Drawing. Application filed April 20,

' This invention relates to a process of treat ing fibres such as artificial silk produced from cellulose compounds such as viscose, and more particularly to a process of delustering the fibres.

Fibres produced from cellulose compounds in the usual methods of producing artificial silk possess a very high luster and gloss. These fibres may be used to produce fabrics comparable to high gloss or lustrous silks. They, however, cannot be used to produce a fabric having a dull appearance or lusterless sheen, which is ofttimes very desirable.

It is therefore an object of this invention to delusterize vegetable fibres such as regenerated viscose fibres without destroying its desirable properties.

It is a further object of this invention to produce a jacquard-like fabric by delustering predetermined or local areas of the fabric.

Further objects will appear from the following description and appended claims.

In my prior applications Serial Nos. 60,685 and 110,536, and of which applicatlons this application is a continuation 1n part, I have described the treatment of celulose fibres with various reagents. I have found that if I apply these reagents to artificial silk fibres I can obtain a dull, delustered artificial silk.

Broadly, my invention comprises a surface treatment of fibres with such a material or materials as will effect a chemical change in the composition of the surface of the fibres, changingiitshigh luster and gloss to a more or lessdull appearance without the loss of the desirable characteristics and properties possessed by the cellulose fibres.

I have discovered that by treating fibres such as regenerated cellulose with an alkalizing agent and subsequently treating the -alkalized'fibres with an esterifying agent in 1 dry or moist condition, as for example, a carboxylic-acid-chloride, a SlllPllOvflCld-ChlOIldG or the anhydride of the corresponding acid and then, after the esterification, thoroughly washing, I obtain a fabric of diminished luster.

As pointed out above, my method is ap- 1928. Serial No. 271,654.

plicable to the production of jacquard-like fabrics, and the method of producing such an formed from regenerated cellulose with an alkalizing agent comprising, for example, a concentrated alkaline solution, with or Without a thickening agent such as gums, with or without the additionof alcohol, or with an alkali alcoholate. After the application of the alkalizing agent to the predetermined. areas, which preferably is by printing, the excess alkali is removed by washing. If desired, the fabric after the application of the alkalizing agent may be dried to prevent spreading of the design, though by careful manipulation this step may be omitted. Various concentrations of the alkalizing agents may be used. I have found that a 14% alcoholic-caustic solution gives satisfactory re sults. I then treat the alkalized surfaces or areas either before or after dryingwith an esterifying agent such as a carboxylic-acidchloride, a sulpho-chloride, or the anhydride of the corresponding acid in dry or moist state. Preferably, I propose to use a 20% solution of para-toluene-sulpho-chloride in carbon tetrachloride 4045 C. and subject the fabric thereto. After removal of the excess of the reagent the treated fabric is thoroughly washed in two soap baths and one soda bath in turn until it is free from the odor and reagents used in the process.

The alkalizing process may also be carried out with potassium hydroxide and, instead of carbon tetra-chloride, I may use a sulphochloride solvent or other chlorinated hydrocarbons of the fatty acid series and also hydrocarbons of the petroleum series and benzol and its homologues, It is also possible to use as esterifying agents. other sulphochlorides of thenon substituted and substituted aromatic hydrocarbons as, for instance, benzo-sulpho-chloride, ortho-toluol sulphochloride, xylol and naphthaline sulpho-chlorides and chlorine, bromine and nitro derivatives of all these compounds.

v Having described my invention, I claim: 1. The process of treating regenerated cellulose fibres to remove lustre which comprises treating the alkalized fibre with para-toluenesulpho-chloride.

2. The process of treating fabrics containing regenerated cellulose fibres to remove lustre which comprises applying to the fabric a chemical having a thick and gummy consistency, and capable of effecting a substitu- ,bath is not a solvent for the first mentioned composition.

4. The process of figuring fabrics which comprises printing thereon a substance capable of altering the chemical composition of the fibres, subjecting the same to a second bath in Which the rinted substance is insoluble and capable of effecting an alteration of the composition resulting from said first mentioned alterationand subsequently removing all uncombined treatment chemicals.

5. A process of forming a pattern upon fabrics containing regenerated cellulose fibres which comprises effecting a substitution in the molecule by a printing composition and subsequently effecting a second substitution by immersion.

6. A printing composition for use in removing lustre from fabrics containing regenerated cellulose fibres comprising an alcohol-caustic solution thickened with gum.

7 The process of forming a pattern upon" fabrics containing regenerated cellulose fibres, which comprises reacting upon the same by two chemicals which, together, are capable of effecting lustreless substitution in the molecules, including the application of one of said chemicals by printing.

8. The process of treating regenerated cellulose fibres to remove luster which comprises subjecting said fibres to an alkalizing medi- I um and subsequently treating the allralized fibres with an esterifying agent.

9. The process of treating regenerated cellulose fibres to remove luster which comprises subjecting said fibres to an alkalizing medium and subsequently treating the alkalized fibres with an organic sulpho-chloride.

10. The process of treating regenerated cellulose fibres to remove luster which comprises subjecting said fibres to a composition including an alcoholic caustic solution and cellulose fibres to remove luster which comprises subjecting said fibres to a composition including an alcoholic caustic solution and then treating the alkalized fibres with an organic sulpho-chloride.

12. The process of treating regenerated cellulose fibres to remove luster which comprises subjecting said fibres to a composition including an alcoholic caustic solution and then treating the alkalized fibres with paratoluene sulpho-chloride.

13. The process of forming a pattern upon fabrics containing regenerated cellulose which comprises treating predetermined areas of said fabric with a printing composition including an alkalizing medium and subsequently esterifying said areas.

14. The process of forming a pattern upon fabrics containing regenerated cellulose which comprises treating predetermined areas of said fabric with a printing composition including an alkalizing medium and subsequently treating said areas with an organic sulpho-chloride.

15. A printing composition used in removing luster from regenerated cellulose fibres comprising an alcoholic solution containing a thickener and 14% of caustic.

In testimony whereof, I have affixed my signature to this specification.

GIOVANNI TAGLIANI.

then treating the alkalized fibres with an esterifying agent.

11. The process of treating regenerated 

